#include "Circle.h"
void Circle::set_r(double r)
{
	m_r = r;
}
double Circle::get_r()
{
	return m_r;
}
double Circle::get_area()
{
	return N * m_r * m_r;
}
double Circle::get_girth()
{
	return 2 * N * m_r;
}